rustc: Change ty::get_impl_traits to return an option instead of a vec#6543
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catamorphism wants to merge 1 commit intorust-lang:incomingfrom
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rustc: Change ty::get_impl_traits to return an option instead of a vec#6543catamorphism wants to merge 1 commit intorust-lang:incomingfrom
catamorphism wants to merge 1 commit intorust-lang:incomingfrom